Cylinder for internal-combustion engines.



C. REGENBOGEN & P. A. BITTER.

\ CYLINDER FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED mzc.24. I913.

1,156,31 2, Patented Oct. 12, 1915.

f4 I z i UNITED STATES PATENT OFFICE.

CONRAD REGENBOGEN AND PAUL ALEXANDER BITTER, OF KIEL, GERMANY.

CYLINDER EOE INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Application filed December 24, 1913. Serial No. 808,590.

. To all whom it may concern:

, Be it known that we, CONRAD REGEN- BOGEN and- PAUL ALEXANDER Rrrrnn,citizens of the German Empire, both residing at Kiel, Germany, haveinvented certain new and useful Improvements in Cylinders forInternal-Combustion Engines, of which the following is a specification.

In internal combustion engines, that part of the cylinder whichsurrounds the combustion chamber sometimes sufl'ers very se- Verestrains, which it is not capable of withstanding particularly when thenecessary valves are arranged in the cylinder wall, that is to say whenthe wall is interrupted It would of course appear mder wall at the partwhere the combustion chamber is, but this proceeding does not howeverattain the desired result, as with such specially strongly constructedwalls, the expansion and contraction thereof which is caused by thegreat fluctuations of pressure and temperature which arise do not permitof satisfactory working. On the contrary experience has shown that ifthis proceeding is adopted, -fine cracks easily arise which rapidlybecome larger and jeopardize the cylinder all the more.

Now the object of this invention 1s to obviate this disadvantage.

The invention is illustrated in the drawing, in which the upper part ofthe cylinder of a vertical internal combustion engine is shown invertical section.

The cylinder comprises a cylinder jacket A, closed at the to an innercap-shaped cover B, the cylindrical wall portion of which is continueddown over the combustion chamber, and the liner C within which works thepiston, which is not shown. The cylinder jacket A and the liner C areformed of cast iron, while the cap-like cover B may conveniently be madeof a specially strong material, such as wrought iron, steel or the like.The cover B has two annular flanges b b and is inserted in the jacket Ato the annular flange a of the liner C by rection, the valves screws E.The construction of the cylinder is so arranged in the manner known per80, that the liner C is capable of sliding in an axial direction insidethe cylinder jacket A; The necessary valves F are arranged in boringsa 1) formed. in the cylinder jacket A and cover B respectively, and theglands F, of the valves F are screwed into the borings b in the cover B,While they are movable in the direction of their axes in the borings ain the jacket A and are packed by means of packing G. During the workingof the engine the cover B can expand in an axial di- F moving in theborings a. Owing to its connection with the liner C the cover B can alsomove in a radial direction.

By means of the above described arrangement and construction of thecover B, a considerable advantage is obtained in a double respect.Firstly, that the part of the engine cylinder which is liable to be mostseverely strained and most subject to destruction, under the action ofthe high pressure and the great diflerences of heat, is enabled toexpand unimpeded so that strains which would jeopardize the cylindercannot easily arise. On the other hand the cover B surrounding thecombustion chamber may, owing to its simple formation be made ofspecially strong material by casting, forg ing or pressing, so that thehighest requirements in respect of strength may be provided in the abovedescribed cylinder, at a comparatively low cost of manufacture.

e claim:

1. A cylinder for internal combustion engines having a closed,surrounding jacket with an integral head and a liner therein; aninterchangeable cap-shaped cover attached to the liner and removabletherewith while so attached, said cover surrounding the combustionchamber which cover is capable of expanding freely together with saidliner both in an axial and a radial direction within said jacket.

2. A cylinder for internal combustion engines having a closed,surrounding jacket with an integral head and a liner therein; aninterchangeable cap shaped cover attached to the liner and removabletherewith while so attached, said cover surrounding the combustionchamber which cover is capable of expanding freely together with saidliner both in. an axial and a' radial direction within said jacket; thecover being made of specially strong material such as wrought iron,steel or the like by forging, casting or pressing.

3. A cylinder for internal combustion engines having a closed,surrounding jacket and a liner therein; an interchangeable capshapedcover detachably connected to said liner and surrounding the combustionchamber which cover is capable of expanding freely both in an axial anda'radial direction within said jacket, valves opening into thecombustion chamber, the seats of said valves being rigidly connected tothe cover while they pass through the cylinder jacket in a manner whichpermits of a sliding movement relative to said jacket.

4. A cyllnder for internal combustion engines having a closed,surrounding acket and a liner therein; an interchangeable capshapedcover surrounding the combustion chamber and situated intermediate saidliner and jacket which cover is capable of expanding freely both in anaxial and a radial direction within said jacket, the cap-shaped cylindercover being provided with two annular flanges, one of which serves toconnect the cover to the liner, and the other for the transmission ofstresses to the cylinder jacket.

In testimony whereof We have aflixed our signatures in presence of twowitnesses.

CONRAD REGENBOGEN.

PAUL ALEXANDER BITTER. I

Witnesses:

JULIUs ROPKE, KARL FRIEDRICH FRENT'ZEL.

